[Elecraft] Supervisory Microcircuits
[email protected]
[email protected]
Fri May 10 10:07:00 2002
The idea of charging the NiCd or NiMH 8-pack needs to be looked
into further. What is required is a small supervisory microcircuit
or charge controller on a tiny PC board that performs all charging
functions. It needs to have all the parts and attach with just a couple
of source voltage wires.
There are several companies that sell the microcircuits that
perform the charging functions. Some have modules with all
the parts ready to attach to a battery pack.
Maxim www.maxim-ic.com
Linear Technology www.linear.com
Benchmarq www.benchmarq.com bq2054 and bq2058 for
3 or 4 cells
Temic (Siliconix) www.temic.com
National Semiconductor www.nsc.com
For example, Benchmarq offers a complete supervisory module for
Lithium-Ion cells with everything but the batteries on a PC board
measuring 2.6X0.7 inch (bq2158) and fully assembled. This idea
from QST is for a Lithium-Ion type battery, but similar modules should
be available for Nickel-Metal Hydride and Nickel Cadmium
batteries. Perhaps someone with time and access to the Web
can check out supervisory modules for 8-packs.
Ref> Don Gagnon, Which Battery Should You Use in Your
Equipment?, QST, April, 1999, p. 40.
Ken Brown-N4SO
Mobile, AL EM50tk
Elecraft K-1
4 ele. monoband yagi
[email protected]
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